Ultrasonic measuring method and system for measuring particle size and mass concentration

Abstract

A measurement method comprising: transmitting a plurality of ultrasonic signals to the fluid to be measured; receiving an return signal reflected or scattered from the particles in the fluid under test; calculating a one or more calculated values of the R parameter associated with the particle properties based on the return signal; determining the theoretical curve of the R parameter associated with the particle properties; and determining the mean diameter of the particles in the fluid based on the one or more calculated values of the R parameter and the theoretical curve of the R parameter; determining the mass concentration of the particles in the fluid according to the mean diameter of the particles. Embodiments also provide a measurement system for measuring the mean diameter and mass concentration of the particles.

Description

BACKGROUND[0001]The present invention relates to a measurement method and system, and more particularly, to a method and system for measuring the mean diameter and mass concentration of suspended particles in a fluid.[0002]In the method of measuring fluid flow using the Doppler principle, the particles suspended in the fluid reflect or scatter the ultrasonic signal transmitted by the one or more transducers. The energy of the Doppler return signal reflected or scattered is related to the diameter and mass concentration of the particles. When the diameter of the particles is small or the mass concentration is low, the return signal is weaker; when the diameter of the particles increases or the mass concentration increases, the return signal also becomes stronger. However, on the one hand, when the diameter of the particles is too large, due to their own weight being too heavy, the suspended particles have a larger velocity relative to the fluid itself, in this case, if the movement v...

AI Technical Summary

Benefits of technology

The patent describes a way to measure particles in a fluid by using ultrasonic signals. By measuring the time it takes for the signals to bounce back from the particles, the system can calculate certain values that are related to the properties of the particles. These calculated values are then compared to a theoretical curve to determine the average size of the particles in the fluid. This information can be used to determine the concentration of particles in the fluid. The patent provides a simple way for researchers to measure the size and concentration of particles in a fluid, which can be useful in a variety of applications.

Problems solved by technology

However, on the one hand, when the diameter of the particles is too large, due to their own weight being too heavy, the suspended particles have a larger velocity relative to the fluid itself, in this case, if the movement velocity of the suspended particles is still used as the movement velocity of the fluid itself, it will reduce the accuracy of the flow measurement; on the other hand, when the mass concentration of the particles is too large, the attenuation of the ultrasonic signal in the fluid is also larger, where the return signal received by the one or more transducers is also weaker, with even a lower signal-to-noise ratio affecting the measurement of flow rate.

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